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Physico-chemical studies of organofluorine compounds: experimental and theoretical approaches

Grant number: 19/05028-7
Support type:Research Grants - Visiting Researcher Grant - International
Duration: October 12, 2019 - October 26, 2019
Field of knowledge:Physical Sciences and Mathematics - Chemistry
Cooperation agreement: CONFAP ; Newton Fund, with FAPESP as a partner institution in Brazil ; UK Academies
Principal Investigator:Rodrigo Antonio Cormanich
Grantee:Rodrigo Antonio Cormanich
Visiting researcher: David O'Hagan
Visiting researcher institution: University of St Andrews, Scotland
Home Institution: Instituto de Química (IQ). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil
Associated research grant:18/03910-1 - Physicochemical studies of fluorinated organic compounds: experimental and theoretical approaches, AP.JP

Abstract

Professor David O'Hagan's (DO'H) primary expertise is in organo-fluorine chemistry as is the main focus of our research, which is being funded by FAPESP through the Young Investigator award (#2018/03910-1); and his deep knowledge on the area will certainly help us to start a new lab in this field that is still incipient in Brazil. So, the visit of Professor DO'H will be extremely important not only to start new collaborative projects, but also to help us to initiate a new, and so far, the first organofluorine lab in Brazil. Organofluorine chemistry is an extremely important area of internationally for the development of fine chemicals, pharmaceuticals and modern materials. We will briefly describe the projects that we plan to collaborate on, in both theoretical and experimental chemistry together with DO'H lab.The scientific programme outlined in this proposal aims to exploit a novel class of organo-fluorine compounds recently developed in St Andrews. The DO'H lab has found that cyclohexane rings, with fluorines arranged around the ring, and with the all cis/syn-stereochemistry, can have extraordinarily polar properties, not the perhaps anticipated hydrophobic properties normally associated with cyclohexanes and increasing levels of fluorination. Their preparation of all cis- tetrafluoro-derivatives and and all cis-hexa- fluorocyclohexane revealed that these compounds are crystalline solids and have unusually high molecular dipole moments for aliphatics. The cyclohexane rings have 'Janus' facial polarity, with a more negative fluorine face and a more positive hydrogen face, an aspect that is not apparent in any current molecular motifs found in organic chemistry. These observations have emerged recently and immediately suggest a novel design concept, using these as building blocks and motifs for introduction into molecular scaffolds as polar moieties and ligands to interact with complementary electrostatic profiles. The proposal aims to explore the potential of this molecular motif with fluorines and extend also to -CF3 and -OCF3, in a variety of arenas, extending from chemical biology to organic materials (liquid crystals). (AU)